You are sure to fail the exam__________you study hard.A． Wap版

试题详情及答案解析

You are sure to fail the exam__________you study hard.

A．if

B．unless

C．since

D．that

答案：B

试题分析：句意：如果你不努力学习，你肯定会考试不及格。A.if如果；B. unless如果不；C. since 由于；D.that，宾语从句的连词，没有意义。根据句意，故选B。
考点：考查连词的用法。